What are possible drug interactions with Levitra?

Below you will
find some
information excerpted from the FDA-approved package insert for Levitra. However, you should
discuss with your doctor and pharmacist any medications you are currently
taking or any health problems you have, since this list may not be complete
or up-to-date. You should also download and read the entire
insert in detail before taking Levitra. Download the insert from the FDA web
site: http://www.fda.gov/cder/foi/label/2003/021400lbl.pdf.

Do not take LEVITRA if you:

take any medicines called "nitrates"
(See "What important information should you know about LEVITRA?"). Nitrates
are commonly used to treat angina. Angina is a symptom of heart disease and
can cause pain in your chest, jaw, or down your arm.

Medicines
called nitrates include nitroglycerin that is found in tablets, sprays,
ointments, pastes, or patches. Nitrates can also be found in other medicines
such as isosorbide dinitrate or isosorbide mononitrate. Some recreational
drugs called "poppers" also contain nitrates, such as amyl nitrate and butyl
nitrate. Do not use LEVITRA if you are using these drugs. Ask your doctor or
pharmacist if you are not sure if any of your medicines are nitrates.

use recreational drugs called "poppers" like
amyl nitrate and butyl nitrate.

take medicines called "alpha-blockers."
Alpha-blockers are sometimes prescribed for prostate problems or high blood
pressure. If LEVITRA is taken with alpha-blockers, your blood pressure could
suddenly drop to an unsafe level. You could get dizzy and faint.

you have been told by your healthcare provider
to not have sexual activity because of health problems.
Sexual activity can put an extra strain on your heart, especially if your
heart is already weak from a heart attack or heart disease.

are allergic to LEVITRA or any of its
ingredients. The active ingredient in LEVITRA
is called vardenafil.

have blood cell
problems such as sickle cell anemia, multiple myeloma, or leukemia

Can other medications affect LEVITRA?

Tell your doctor about all the medicines you take including prescription and
non-prescription medicines, vitamins, and herbal supplements. LEVITRA and
other medicines may affect each other. Always check with your doctor before
starting or stopping any medicines. Especially tell your doctor if you take
any of the following:

medicines called nitrates (See "What important information should you know
about LEVITRA?")
medicines called alpha-blockers. These include Hytrin® (terazosin HCl),
Flomax® (tamsulosin HCl), Cardura® (doxazosin mesylate), Minipress® (prazosin
HCl) or Uroxatral® (alfuzosin HCl).
medicines that treat abnormal heartbeat. These include quinidine,
procainamide, amiodarone and sotalol.
ritonavir (Norvir®) or indinavir sulfate (Crixivan®)
ketoconazole or itraconazole (such as Nizoral® or Sporanox®)
erythromycin
other medicines or treatments for ED